package com.baike.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

/**
 * Servlet Filter implementation class LoginFilter
 */
@WebFilter("/LoginFilter")
public class LoginFilter implements Filter {
	private final String url="/login.jsp";
    /**
     * Default constructor. 
     */
    public LoginFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here
		
		// pass the request along the filter chain
		HttpServletRequest req=(HttpServletRequest)request;
		HttpSession session=req.getSession();
		String servletPath =req.getServletPath(); 
		if(servletPath.equals("/login.jsp")||servletPath.equals("/forgetPass.jsp")||servletPath.equals("/sdubaike/getCheckCodeImage")){
			chain.doFilter(request, response);
			return;
		}
		//System.out.println(session.getAttribute("loginState"));
		if(session.getAttribute("userutil")==null){
			RequestDispatcher rd =req.getRequestDispatcher(url);
		      rd.forward(request,response);
			return ;
		}
			
		else
		chain.doFilter(request, response);
		//chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
